condition mean min max ZT0-3 59.57155 59.57155 59.57155 ZT4-7 46.677499999999995 46.677499999999995 46.677499999999995 ZT8-11 71.2282 71.2282 71.2282 ZT12-15 80.3068 80.3068 80.3068 ZT16-19 142.3635 142.3635 142.3635 ZT20-23 69.9221 69.9221 69.9221